Results 61 to 70 of about 2,379,646 (229)
Very High Energy Gamma-Rays from Binary Systems [PDF]
, 2010 This thesis presents a study of the very high energy (VHE) gamma-ray emission from X-ray binary systems using the H.E.S.S. imaging atmospheric Cherenkov array.
DICKINSON, HUGH,JOHN +1 more
core
Gamma ray astronomy in the low energy range
, 1979 A low energy gamma ray telescope, and the results of its observations are described. The telescope consisted of four sodium iodide crystals, each of 120 cm2 area, occulted by lead discs.
Bailey, E.P.A.
core +1 more source
Searching for Short-Timescale Transients in Gamma-ray Telescope Data
Galaxies, 2023 Astrophysical sources show variability in their emissions over a range of timescales, with transients such as fast radio bursts (FRBs) and magnetar giant flares (MGFs) showing variability on timescales as short as a few milliseconds.
Annanay Jaitly +2 more
doaj +1 more source
Analysis Methods for Gamma-Ray Astronomy
, 2023 The launch of the Fermi satellite in 2008, with its Large Area Telescope (LAT) on board, has opened a new era for the study of gamma-ray sources at GeV ($10^9$ eV) energies. Similarly, the commissioning of the third generation of imaging atmospheric Cherenkov telescopes (IACTs) - H.E.S.S., MAGIC, and VERITAS - in the mid-2000's has firmly established ...
Malyshev, Denys, Mohrmann, Lars
openaire +2 more sources
Disorder Driven Anisotropic Nonlinear Hall Effect in the Kagome Metal YbCo6Ge6 at Room Temperature
Advanced Science, EarlyView.The intrinsic structural disorder and short‐range correlated motifs in the kagome metal YbCo6Ge6 constitute the primary mechanism for a robust and anisotropic nonlinear Hall effect (NLHE). This effect is sustained across a wide temperature range, achieving a nonlinear responsivity of up to ∼4.5 × 10−3 m/V at 70 K, higher than known disordered and ...
Qurat Ul Ain +11 more
wiley +1 more source
Atmospheric Cerenkov astronomy of cataclysmic variables & other potential gamma ray sources [PDF]
, 1993 Recent developments in the application of the atmospheric Cerenkov technique to 7-ray astronomy are reviewed here. These include new methods of signal to noise enhancement and the increasing diversity of stellar systems positively identified as Very High
Bradbury, S.M, Bradbury, Stella Marie
core
Ultrafast RF Spectrum Analyzer Assisted by Optical Short‐Time Fourier Transform
Advanced Physics Research, EarlyView.We present Recent efforts in an ultrafast RF spectrum analyzer based on the short‐time Fourier transform (STFT) at over 10 MHz frame rate and over 40GHz bandwidth to improve performance and support applications. All these efforts could inspire more innovative applications of temporal imaging modalities in the future.
Liao Chen +4 more
wiley +1 more source
The sensitivity of the Durham mk6 ground-based atmospheric cherenkov telescope to very high energy gamma-ray sources [PDF]
, 2001 The subject of this thesis is a determination of the sensitivity of the Durham Mk6 ground based Imaging Atmospheric Cherenkov Telescope (lACT), an instrument which uses the imaging atmospheric Cherenkov technique to detect Very High Energy (VHE) gamma ...
Lyons, Karl, Lyons, K.
core
Theoretical Modeling of the Exceptional GRB 221009A Afterglow
The Astrophysical Journal LettersThe extraordinary gamma-ray burst GRB 221009A provides a great opportunity to investigate the enigmatic origin and evolution of gamma-ray bursts (GRBs). However, the complexity of the observations associated with this GRB provides significant challenges ...
Luca Foffano +2 more
doaj +1 more source
Principal Component‐Based Classification of Blazar Candidates of Uncertain Type in the 4FGL/LAT
Astronomische Nachrichten, EarlyView.ABSTRACT We adopted principal component analysis (PCA), linear discriminant analysis (LDA), and support vector machines (SVM), to study classification for a sample of 2708 Fermi blazars: 1142 BL Lac objects (BLLs), 759 flat spectrum radio quasars (FSRQs), and 807 blazar candidates of uncertain type (BCUs).
Wen‐Xin Yang +13 more
wiley +1 more source